JSON to Java Class Converter

Convert JSON data into Java classes with Jackson @JsonProperty annotations, private fields, getters, and setters

Key Facts

Category
Developer & Web
Input Types
textarea, text
Output Type
text
Sample Coverage
4
API Ready
Yes

Overview

The JSON to Java Class Converter simplifies backend development by instantly transforming raw JSON payloads into structured Java POJOs. It automatically generates private fields, standard getter and setter methods, and Jackson @JsonProperty annotations to ensure seamless serialization and deserialization.

When to Use

  • •When designing Data Transfer Objects (DTOs) for Java backend services that consume external JSON APIs.
  • •When setting up Jackson-compatible model classes for Spring Boot REST controllers.
  • •When converting complex, nested JSON payloads into structured, type-safe Java class hierarchies.

How It Works

  • •Paste your raw JSON payload into the JSON Input text area.
  • •Specify the name of your main Java class in the Root Type Name field.
  • •Copy the generated Java code containing private fields, Jackson annotations, getters, and setters.

Use Cases

Creating DTOs for Spring Boot applications consuming third-party REST APIs.
Generating Java model classes from mock JSON responses during API integration testing.
Rapidly prototyping Java backend data structures from frontend JSON payloads.

Examples

1. Generating a User Profile DTO

Backend Developer
Background
A developer is integrating a third-party authentication service that returns user profiles in JSON format.
Problem
Manually writing Java classes with Jackson annotations for a multi-field JSON profile is tedious and error-prone.
How to Use
Paste the user profile JSON into the input area, set the Root Type Name to 'UserProfile', and copy the generated Java code.
Example Config
Root Type Name: UserProfile
Outcome
A clean Java class named UserProfile with private fields like name and email, annotated with @JsonProperty, complete with getters and setters.

2. Mapping Nested Order Data

Software Engineer
Background
An engineer needs to process e-commerce order payloads containing nested address and item details.
Problem
Creating nested Java classes manually to match the nested JSON structure takes too much time.
How to Use
Input the nested order JSON, set the Root Type Name to 'OrderResponse', and generate the classes.
Example Config
Root Type Name: OrderResponse
Outcome
An OrderResponse Java class containing nested static classes for Address and Item, all mapped correctly with Jackson annotations.

Try with Samples

json
Terraform Plan JSON Samples
Sample Terraform plan JSON files exported from terraform show -json style payloads for dependency visualization and change review
title token json
json
Android Serialization Java Samples
Android Java serialization examples including JSON serialization, deserialization, and XML parsing
title token java
json
Chat Transcript JSON Samples
JSON examples for multi-role chat transcripts
title token json
json
JSON Samples
JSON (JavaScript Object Notation) format examples from simple to complex structures
title token json
json

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FAQ

Does this tool support nested JSON objects?

Yes, it automatically generates nested static classes to represent nested JSON structures.

Which JSON library annotations are used?

The tool generates Jackson @JsonProperty annotations for mapping JSON keys to Java fields.

What Java types are mapped from JSON types?

Strings map to String, integers to int/Integer, decimals to double/Double, booleans to boolean, and arrays to List.

Can I customize the name of the main class?

Yes, you can define the main class name using the Root Type Name option.

Does the generated code include getters and setters?

Yes, standard Java getter and setter methods are generated for all private fields.

API Documentation

Request Endpoint

POST /en/api/tools/json-to-java

Request Parameters

Parameter Name Type Required Description
jsonInput textarea Yes -
rootName text No -

Response Format

{
  "result": "Processed text content",
  "error": "Error message (optional)",
  "message": "Notification message (optional)",
  "metadata": {
    "key": "value"
  }
}
Text: Text

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-json-to-java": {
      "name": "json-to-java",
      "description": "Convert JSON data into Java classes with Jackson @JsonProperty annotations, private fields, getters, and setters",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=json-to-java",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

If you encounter any issues, please contact us at [email protected]